MICE RF System Power Supplies, Control and Monitoring Status report December 2011 Chris White, STFC Daresbury Laboratory

MICE RF Design Review December 2011

MICE RF Design Review December 2011 TH116 140 uF 29 uF 20 kV PSU to ISIS design MICE RF Design Review December 2011

20 kV Power Supply for 4616 HV Power Supply 20 kV 4616 Circuit Enclosure Auxiliary Rack RF Signal Generator (201 MHz) Control Crate Resistor bank RF cable RF output (co-ax) 4616 Tube PLC Crate Capacitor Charger 20 kV+ Screen cable Heater Controller Grid cable Water cooling circuits (4) RF solid state amplifier Earth Switch Compressed air cooling Crowbar (Ignitron) Grid PSU (300 Vdc) HV cable Dump Relay Screen Pulser (2000 Vdc) 0.95V 500A Capacitor 29 uF Screen PSU (600 Vdc) Heater Transformer MICE RF Design Review December 2011

MICE RF Design Review December 2011 38 kV Power Supply for TH116 HV Power Supply 38 kV TH116 Circuit Enclosure Auxiliary Rack Control Crate HV cable TH116 Tube Resistor bank RF output (co-ax) PLC Crate RF input from 4616 (co-ax) Capacitor Charger 40 kV+ Heater Controller Water cooling circuit Trigger pulse Cathode Modulator 450V DC Bias PSU Earth Switch Compressed air cooling Crowbar (Thyratron) Dump Relay Cooling Fans 20V 500A Capacitor 140 uF Heater Transformer MICE RF Design Review December 2011

Daresbury Laboratory - Plant Room 1 - RF Test Area MICE RF Design Review December 2011

Cooling Water Systems (DL) DL site cooling system decommissioned Ex-SRS twin-circuit chiller installed Demin for amplifiers Glycol for load Now fully operational MICE RF Design Review December 2011

MICE RF Design Review December 2011 TH116 Circuit #1 Mechanically complete New fans fitted Cathode modulator built Motorised tuners Electrical control panel Heater controller Safety interlocks Tested to 1 MW RF output MICE RF Design Review December 2011

MICE RF Design Review December 2011 Cathode Modulator IGBT switch IGBT control board Potential divider Zener diode array 38 kV Trigger 450Vdc 15k 2R7 33R From 4616 IGBT TH116 TH116 CATHODE MODULATOR CIRCUIT Fully operational Second unit almost complete MICE RF Design Review December 2011

MICE RF Design Review December 2011 Circuit tuning motors MICE RF Design Review December 2011

TH116 Electrical Control Panel Fan control-gear Heater controller (thyristor) Circuit-breakers Tuning control relays MICE RF Design Review December 2011

MICE RF Design Review December 2011 TH116 38kV Power Supply 2 x 70 μF Capacitors Crowbar (thyratron) Control unit Power module Dump relay Earth switch Charger (40 kV) Resistors Crowbar testing Crowbar (Thyratron) HV Resistors HV Capacitors (140 uF) Power Supply Rack (Front) MICE RF Design Review December 2011

RF HV Power Supplies - Components HV PSU Control Unit TH116 Circuit (lower part) 20 kV PSU & Aux. rack – front view 38 kV PSU – rear view 38 kV PSU – 1 MW RF output 38 kV PSU – resistor bank Crowbar (38 kV Thyratron) MICE RF Design Review December 2011

RF Control & Monitoring System EPICS Server 4616 & TH116 Aux. Racks Network/ Controls Rack VME Crate Canbus modules DAC/ADC modules Typical I/L Digital signals/serial link PLC Crate (TH116) Interlocks Compressed air pressure Digital signals/serial link PLC Crate (4616) Interlocks Water flow Panel switches Analog signals Grid PSU (4616) Enable Analog signals Screen PSU (4616) Enable Heater Controller (4616) Enable Analog & digital signals Heater V and I Heater Controller (TH116) Enable Analog & digital signals Heater V and I Analog & digital signals Enable 450V DC Bias PSU Interlocks MICE RF Design Review December 2011

RF Power Supplies - MICE Hall Layout RF Amplifiers RF Power Supply Racks Air Conditioning Units RF Network/Control Racks Layout of North Mezzanine MICE RF Design Review December 2011

MICE RF Design Review December 2011 Timescale Current work in progress: RF testing of System #1 with new 4616 and TH116 tubes Nov 11 to Dec11 Future work (Step V): time-scales to be confirmed Assembly of CERN TH116 amplifier (System #2) ---------------------- (July 2012) Test CERN amplifier at Daresbury ----------------------------------------- (December 2012) Develop RF Control Systems Pack & ship complete system #1 to RAL --------------------------------- (January 2013) Install RF System #1 in MICE Hall ----------------------------------------- (May 2013) Test complete RF system #1 at RAL -------------------------------------- (September 2013) Construct & test 4616 #2 amplifier, power supply & controls Construct & test TH116 #2 power supply & controls Test complete RF system #2 at DL Pack & ship system #2 to RAL Install RF System #2 in MICE Hall Test complete RF system #2 at RAL Tasks in red are required for TIARA (deadline in brackets) MICE RF Design Review December 2011

Power Supplies – Construction Status - Step V RF System #1 built and under test (manually controlled) Work required: Control & monitoring upgrade for 4616 Screen Pulser (2 kV) Interface to MICE control system Interface to PLC (Siemens S7-200) Interface to Heater Controller (Eurotherm) Interface to Low Level RF and Timing System RF System #2: 4616 amplifer circuit refurbishment has started 20 kV Power Supply rack to be built (some components available, some ordered) 4616 Auxiliary rack to be built (components to be ordered) CERN amplifier at DL – to be assembled when required Cathode modulator virtually complete 38 kV Power Supply rack to be built (components to be ordered) TH116 Auxiliary rack to be built (components to be ordered) Second dummy load to be procured for use with CERN amplifier (twin output) 4616 Tube & Connections MICE RF Design Review December 2011

Power Supplies – Construction Status - Step VI RF Systems #3 and #4: TH116 amplifier circuit (ex-LBNL): Mechanical refurbishment complete, tuning motors fitted Electrical control panel to be built Second CERN amplifier at DL – to be assembled when required Cathode modulators to be built 4616 amplifer circuit (ex-LBNL) refurbishment has started Fourth 4616 amplifier circuit to be purchased 20 kV Power Supply racks to be built (some components available, some ordered) 4616 Auxiliary racks to be built (components to be ordered) CERN amplifier at DL – to be assembled when required 38 kV Power Supply racks to be built (components to be ordered) TH116 Auxiliary racks to be built (components to be ordered) 20 kV PSU and Aux. Rack MICE RF Design Review December 2011

MICE RF Design Review December 2011 RF Power Supplies Questions ? 20 kV PSU (front) 38 kV PSU – Charger (rear) 38 kV PSU Dump Relay & Voltage divider 38 kV PSU - rear view MICE RF Design Review December 2011